Customer Success Engineer, AtomEngine

As a Customer Success Engineer at Onebrief, you operate at the intersection of engineering and mission execution. You'll deploy AtomEngine into real-world military training environments, including Secret and air-gapped systems, where you'll configure, extend, troubleshoot, and improve the platform while working directly with customers. You may be supporting live exercises, adapting simulations, or ensuring the software performs under pressure.

Responsibilities

Deploy, configure, and support AtomEngine in live military training environments, including classified and air-gapped systems, by extending entities, features, behaviors, sensors, and operational scenarios through AtomEngine tooling and scripting to reflect real-world requirements; Embed onsite with customers at Fort Belvoir to understand operational needs, iterate alongside users, ensure successful deployments, and translate real-world friction into actionable Product and Engineering feedback; Integrate AtomEngine with partner systems by configuring and troubleshooting APIs, networking, infrastructure dependencies, and system connectivity, while resolving technical issues in real time during high-visibility exercises; When not supporting active exercises, proactively identify and implement improvements from the enhancement backlog, contributing to the engineering backlog using technologies such as Godot, C++, C#, and Python; Communicate technical concepts clearly to military stakeholders, partners, and internal teams; Improve documentation, deployment processes, and operational repeatability to enable scalable deployments and long-term customer success; Travel occasionally to support customer engagements and operational exercises

Requirements

3+ years of experience in software engineering, solutions engineering, technical consulting, or another customer-facing engineering role involving hands-on development; Demonstrated experience writing and maintaining production-quality software, with proficiency in one or more programming languages such as C++, C#, Python, GDScript, or similar; Experience troubleshooting software systems, integrations, networking, or distributed applications, with strong communication skills and the ability to explain technical concepts to both technical and non-technical audiences; Comfortable working independently in fast-paced, ambiguous environments while collaborating closely with customers and engineering teams; Prior military experience and Active Secret security clearance; Willingness and ability to work onsite at Fort Belvoir daily and travel to other sites approximately 20% of the time

Nice to have

Experience presenting or teaching technical concepts to large groups; Experience in modeling, simulation, game engines, or defense-related systems